3y-8+15=21

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Solution for 3y-8+15=21 equation:


Simplifying
3y + -8 + 15 = 21

Reorder the terms:
-8 + 15 + 3y = 21

Combine like terms: -8 + 15 = 7
7 + 3y = 21

Solving
7 + 3y = 21

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 3y = 21 + -7

Combine like terms: 7 + -7 = 0
0 + 3y = 21 + -7
3y = 21 + -7

Combine like terms: 21 + -7 = 14
3y = 14

Divide each side by '3'.
y = 4.666666667

Simplifying
y = 4.666666667

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